Do you always touch the tip of your tongue just behind your top teeth when saying the letter l? i have just realised that i dont always do it, for example if i said the word ball, bill, wild, my tongue sort of just floats in the middle or touches the bottom of my mouth. Also words like sleep, slow, and when i consciously raise my tongue to touch the top of my mouth, it doesnt feel right, i sort of make a clinking sound, same with any sentence where an l comes after an s.
Just a thought.
Loughborough at number 1